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March 25, 2017

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simplify (-19)^2

  • algebra - ,

    in fact,this question is to calculate,and not just simplify.

    (-19)^2
    =19^2
    =(10+9)^2
    =10^2+2(9)(10)+9^2
    =100+180+81
    =361

    in this question,we can see that there is no need to calculate the answer by using CALCULATOR

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